We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

3G Electric
ARO 104390-2 Compressed Air Line Lockout Valve, 1/4 in NPT, 250 psi - ARO Compressed Air Line Lockout Valves for FRLs
AROARO Compressed Air Line Lockout Valves for FRLs

ARO 104390-2 Compressed Air Line Lockout Valve, 1/4 in NPT, 250 psi

The ARO Air Line Lockout Valve (SKU 3G-OTH-187824) is a compressed air line lockout valve for FRLs with a 1/4 in NPT inlet and outlet size. It has a maximum operating pressure of 250 psi and is identified by…

SKU 3G-OTH-187824

Also listed as: 1043902 · 104390 2

Brand
ARO
Item
104390-2 Compressed Air Line Lockout Valve, 1/4 in NPT, 250 psi
Part Number
104390-2
Category
ARO Compressed Air Line Lockout Valves for FRLs
Available to Order
Also known as:104390-2ARO
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

ARO
Manufacturer Part Number
104390-2
Type
1000
Max Op Pressure
250 psi
NPT Outlet Size
1/4 in

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

ARO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The ARO Air Line Lockout Valve (SKU 3G-OTH-187824) is a compressed air line lockout valve for FRLs with a 1/4 in NPT inlet and outlet size. It has a maximum operating pressure of 250 psi and is identified by manufacturer part number 104390-2.

Frequently Asked Questions

What is an ARO Air Line Lockout Valve used for?

An ARO Air Line Lockout Valve is used to isolate compressed air in pneumatic systems during maintenance or emergencies. It ensures safe lockout/tagout procedures on FRL units, preventing accidental pressurization. Common in manufacturing plants, assembly lines, and industrial facilities requiring OSHA-compliant energy isolation.

What are the specifications of the ARO Air Line Lockout Valve 104390-2?

The ARO Air Line Lockout Valve (MPN 104390-2) has 1/4 in NPT inlet and outlet ports, a maximum operating pressure of 250 psi, and is part of the 1000 series. It is designed for compressed air FRL systems. 3G Electric supplies this valve globally.

Where to buy ARO Air Line Lockout Valve 104390-2 worldwide?

3G Electric supplies the ARO Air Line Lockout Valve 104390-2 worldwide. As a global industrial equipment distributor since 1990, we handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time.

How to install an ARO Air Line Lockout Valve?

Install the ARO Air Line Lockout Valve in the compressed air line upstream of the FRL unit. Use thread sealant on the 1/4 in NPT connections and tighten to manufacturer torque specs. Verify lockout functionality by cycling the valve and checking for leaks before system pressurization.

Used in

Common applications for ARO
Chemical processing — ARO AODD pumps with PTFE diaphragms and 316 SS wetted parts for corrosive fluid transfer
Food and beverage — FDA-compliant ARO AODD pump SD20S-CSS-SMM-B00 with Santoprene diaphragm and Tri-Clamp connections
Water treatment — ARO air control valves and FRL units for pneumatic control in filtration and dosing systems
General manufacturing — ARO air-end repair kits and O-rings for maintaining double diaphragm pumps in assembly lines
Pharmaceutical — ARO sanitary AODD pumps with 316 SS check valves for shear-sensitive and sterile fluid handling
Oil and gas — ATEX-rated ARO FRL units and air control valves for use in hazardous atmospheres
Not sure this is the right part? Photo-identify it→

ARO Products

3G Electric supplies ARO aro compressed air line lockout valves for frls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

More from ARO

View all ARO parts →
This lockout valve isolates compressed air in FRL systems for safe maintenance. It features 1/4 in NPT inlet and outlet ports with a maximum operating pressure of 250 psi. Suitable for pneumatic lockout/tagout procedures in industrial settings
ARO
This lockout valve isolates compressed air in FRL systems for safe maintenance. It features 1/4 in NPT inlet and outlet ports with a maximum operating pressure of 250 psi. Suitable for pneumatic lockout/tagout procedures in industrial settings

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first